It is currently Tue Oct 16, 2018 11:15 am

All times are UTC - 7 hours





Post new topic Reply to topic  [ 21 posts ]  Go to page Previous  1, 2
Author Message
PostPosted: Fri Apr 08, 2016 5:19 am 
Offline

Joined: Mon Apr 04, 2016 7:59 am
Posts: 32
tepples wrote:
NesCartDB has no report of The Immortal having been released outside North America. (If there were such a report, there would be a flag of Japan in "More Profiles".) The 72-pin Sharp NES TV used the composite PPU, not the RGB PPU.

They were on the shelf in every K-Mart, which is where I plugged in and played SMB/DH as a kid. Using the composite PPU and being incompatible would mean that the unit's television simply wasn't tolerant of the signal (same as modern TVs) which is what I'm curious about. If so, the game would be one of the few incompatible titles.


Top
 Profile  
 
PostPosted: Sat Apr 09, 2016 2:43 pm 
Offline

Joined: Tue Nov 23, 2004 9:35 pm
Posts: 702
CZroe wrote:
tepples wrote:
NesCartDB has no report of The Immortal having been released outside North America. (If there were such a report, there would be a flag of Japan in "More Profiles".) The 72-pin Sharp NES TV used the composite PPU, not the RGB PPU.

They were on the shelf in every K-Mart, which is where I plugged in and played SMB/DH as a kid. Using the composite PPU and being incompatible would mean that the unit's television simply wasn't tolerant of the signal (same as modern TVs) which is what I'm curious about. If so, the game would be one of the few incompatible titles.


You are incorrect because the Sharp Famicom TV is not the same thing as the Sharp NES TV :

Sharp Famicom TV : Japan, 60 Pin Connector, 2C03 RGB PPU - Incompatible
Sharp NES TV : US, 72 Pin Connector, 2C02 Composite PPU - Compatible

The only titles that may have been incompatible with the Sharp NES TV back in the day are the unlicensed games with lockout defeating circuitry that did not work.

_________________
Nerdly Pleasures - My Vintage Video Game & Computing Blog


Top
 Profile  
 
PostPosted: Sat Apr 09, 2016 5:45 pm 
Offline

Joined: Mon Apr 04, 2016 7:59 am
Posts: 32
Great Hierophant wrote:
CZroe wrote:
tepples wrote:
NesCartDB has no report of The Immortal having been released outside North America. (If there were such a report, there would be a flag of Japan in "More Profiles".) The 72-pin Sharp NES TV used the composite PPU, not the RGB PPU.

They were on the shelf in every K-Mart, which is where I plugged in and played SMB/DH as a kid. Using the composite PPU and being incompatible would mean that the unit's television simply wasn't tolerant of the signal (same as modern TVs) which is what I'm curious about. If so, the game would be one of the few incompatible titles.


You are incorrect because the Sharp Famicom TV is not the same thing as the Sharp NES TV :

Sharp Famicom TV : Japan, 60 Pin Connector, 2C03 RGB PPU - Incompatible
Sharp NES TV : US, 72 Pin Connector, 2C02 Composite PPU - Compatible

The only titles that may have been incompatible with the Sharp NES TV back in the day are the unlicensed games with lockout defeating circuitry that did not work.

So, we know that the combination of $0D and emphasis bits doesn't cause the scrambling/rolling problem on the Sharp NES TV like it does on most modern TVs?


Top
 Profile  
 
PostPosted: Sat Apr 09, 2016 5:50 pm 
Online

Joined: Sun Apr 13, 2008 11:12 am
Posts: 7648
Location: Seattle
Whether the use of color $0D and/or emphasis bits is problematic varies widely from TV to TV. When I was testing voltages for the IRE test for Tepples's test suite, even the combination of $0D and emphasis did not screw up the horizontal timing on the 2006-era TV I was using at the time.


Top
 Profile  
 
PostPosted: Sat Apr 09, 2016 9:03 pm 
Offline
User avatar

Joined: Sun Jan 22, 2012 12:03 pm
Posts: 6876
Location: Canada
I've seen the many different responses from TVs and capture devices I've tested with an $0D colour signal:

1. Wobbly areas of the screen in horizontal strips. (loss of horizontal blank integrity?)
2. Wobbly/rolling screen in general. (loss of vertical blank integrity?)
3. Drops the signal entirely. (probably same as 2 but for a TV that's converting to digital)
4. $0D rendered at same colour as regular black.
5. $0D rendered slightly darker than regular black.
6. Introduction of $0D causes the black level to renormalize after several seconds, causing a slow transition from 4 to 5 as it becomes the "new" black.


Top
 Profile  
 
PostPosted: Wed Dec 20, 2017 1:03 am 
Offline

Joined: Mon Apr 04, 2016 7:59 am
Posts: 32
Well, I've had Everdrives for well over a year now and I finally got around to patching a ROM with these fixes. It works, but it seems that we missed one.

First I tried these:
Battle screen
YEXNPNIE
0001F7B9: 0D 0F

Title screen
YEKNPNIE
0001F7D9: 0D 0F

Walking screen
YEVNPNIE
0001F7F9: 0D 0F

Sprite
YEVNTNIE
0001F7FE: 0D 0F

Just after the wizard raises his staff, the screen flashes. This consistently causes it to lose sync on one of my displays. I added the ones we were wondering about (let me know if I got the GG encoding wrong):
Unknown 1
YESNZNIE
0001F7EA: 0D 0F

Unknown 2
YESNLNIE
0001F7EB: 0D 0F

Unknown 3
YESNGNIE
0001F7EC: 0D 0F

It still happens. :(

I loaded it up into FCEUX and frame-stepped that part until the PPU viewer showed all black. Sure enough, many of the palettes show 0D when I mouse over them. I don't know how to find the offset in ROM from that though.

Edit: Got it! I my hex editor I saw a pattern of 00 and 0D that looked very similar to what I saw when mousing over the palettes in the PPU viewer. Changed those all to 0F and now it works!


Top
 Profile  
 
Display posts from previous:  Sort by  
Post new topic Reply to topic  [ 21 posts ]  Go to page Previous  1, 2

All times are UTC - 7 hours


Who is online

Users browsing this forum: No registered users and 2 guests


You cannot post new topics in this forum
You cannot reply to topics in this forum
You cannot edit your posts in this forum
You cannot delete your posts in this forum
You cannot post attachments in this forum

Search for:
Jump to:  
Powered by phpBB® Forum Software © phpBB Group